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Finding the Fourth Proportional to 779.73, 1,168.88 and 285.79

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Solution

The fourth proportional to 779.73, 1,168.88 and 285.79 is: 428.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.73 : 1,168.88 = 285.79 : x
  2. Step 2: Convert to fraction form
    779.73/1,168.88 = 285.79/x
  3. Step 3: Cross multiply
    779.73x = 1,168.88 × 285.79
  4. Step 4: Simplify right side
    779.73x = 334,054.22
  5. Step 5: Solve for x
    x = 334,054.22/779.73
  6. Step 6: Final answer
    x = 428.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.